Pressure-burner.



W. F. SEILKUP.

PRESSURE BURNER.

APPLICATION FILED 00117. 19m.

Fatented May T, i918.

II www .5 K y may i fili' till PMESSUEJBURN lpeeicstion et lLetters patent.

Patented, lllay t, lilith.

Application filed October i?, 1917. Serial No. 1922106.

dent ot Cincinnati, in the county ci. llamil* ton and State of Ohio, have invented certain new and useful improvements in lfressureurners, of which the iollowing` is z speciiication.

My invention relates to pressure-burners. and its object is vto provide for an eliicient combustion of ordinary fuel gas with a supply ot air under pressure.

lli/.Ly invention consists in the combination oit parts and in the details et construction and arrangement. of parts as will hereinafter be more fully described and claimed.

lin the drawing:

Figure l is a xgeneral perspective view of a device embodying my invention;

Fig. 2 is a view ot the front end ot' the burner;

3 is a vertical longitudinal section ot the burner on a plane e.oi-responding;` lo the line 3 3 of Fig. 2, the middle parts ot the burner being omitted for lack of space.

As ll'. prefer to construct my improved burner, there is the main gas tube 1, the trout end et which is screwed through a 'bushing 2 3) and the rear end of which is screwed into a coupling 3 which comprises a main straight part lland a branching part 5 (Fig. 1.) The burnerhooel comprises a couplinr; (i having its rear end part screwed onto the outside o the bushing 2, and having screwed into its-stront end part the main hood part 7. These arts 6 and 7 have perforations 8 and 9, respectively, in their walls.

Where the main gas tube 1. entends fori ward through the bushing 2, it recei'ves on its end part a cap 10 that has a coiicentric series ci perforations 11 through its front, and a large central perforation through which extends the compr Jseed-airtube 12. This tube 12 extends a considerable idistance forward of the iront side of the ca 1G and has screwed into it a plug 13 wit a very small central passage 14.

The rear end of the main part l ot" the couplingr 3 that connects with vthe rear end ot the tube 1 has the bushing 1,5, and the compressed air tube 12. extendsgthe entire length of the Agas tube 1 and connects, by means et a reducing couplingl 15?, with an inlet pipe 12 that extends bach". through this bushing' 15. Preferably, this pipe 12" is welded to the bushing- 15 where it eX- tends theretlnfougrh, because it is found in practice that this pipe where it extends out at the rear is subjected to hard blows where the tool is thrown around in use. rlhe rear end part of the pipe 1Q preferably bends slightly downward so as Ito come substantially parallel Vwith the branch 5 ot' the couplingr 3 (Fig. 1) and connects through a suitable controlling' coclr 16 with the air hose 1"?. Preferably, a screen 16 1) is interposed therein to prevent passage ot particles to the small orilice 14. The branch 5 communicates through. a suitable controlling` c'ocli` 18 with the gas hose 19.

'With the burner constructed as just described, it will he seen that the gas being supplied through the hose 19 passes forward through the ras tube 1 and out through the perorations 11 into the hood,'while the compressed air from the hose 17 passes forward through the tube 12 and out through thesmall perforation 141.-. The gas issuing` from the perforations 11 uniformly around the j et of compressed air from the portera` tion 14- will be combined therewith and the combustion will be permitted to take place throughout the length of the main hood part 7 with the help of the air through the longitudinally distributed perforations 9 of the hood.

l have improved the construction ot burners of this kind by carrying the orifice 14 for the escape et the compressed air a considerable distance forward ci the gas outlet orifices 11. Where the gas and air escape substantially in the same transverse plane, there is always a tendency with a strong blast of air to extinguish the dame; whereas with my improvement, a stronger blast of air serves .to induce stronger currents ot gas ltromthe orifices 11 upto the capacity of the gassupplv, and those with the increased quantities oi gas and air produce a het flame of greater volume than before the increase of air pressure.

lt will be noted that the cap 10 screws on to the tube 1, but the tube 1Q merely slides through the cap 10. Thus, the cap is very conveniently adjusted lengthwise relatively to the oriiice 14, and is readily removable for cleaning or renewal. Also, the provision of the small plug; 13 in the end ot the tube 12 is very convenient since this plug may be very conveniently removed for cleaning lll@ or renewal. All of the parts of the burner except this plug 13 are preferably made of wrought iron; but this plug 13 is preferably made of brass or other metal less subject to corrosion than iron. This provision is highly desirable where the air contains a considerable proportion of moisture.

l also improve the combustion somewhat by providing the amply large pertorations 8 and 9 in the hood to freely admit air under atmospheric pressure to the outer sides of the jets of gas from the perforations 11.

1t will be understood that burners of this .kind are used for pre-heating where welding is to be done electrically or by means of oxygen and acetylene gas and also for drying molds in foundries and many other kinds of work about a shop where a convenient portable burner with a comparatively large capacity is needed.

Having'fully described my invention, what claim as new and desire to secure by Letters Patent is: l

l. In a pressure-burner,l an outer tube, an inner tube running through the inside of said outer tube, distributing means around said linner tube at the front end of said outer tube with a surrounding series of outlet orifices substantially in a single transverse lane, said inner tube having an outlet orilBice, a hood inclosing the space around said outlet orifices and extendin a considerable distance forwardly thereot and having a longitudinal series of lateral perforations and an open front end, and supply connections to the respective rear ends of said tubes.

2. In a pressure-burner, an outer gas tube, an inner tube running through the inside of said gas tube, gas distributing means around said inner tube at the front end of said outer tube with a surrounding series of gas outlet orifices substantially in a single transverse lane, said inner tube havin an outlet orice a considerable distance forward of said gas outletv orifices, a hood inclosing the space around said outlet orifices and extending a considerable distance forwardly thereof and having a longitudinal series of lateral perforations and an open front end, and'supply connections to the respective rear ends of said tubes.

3. In a pressure burner, an outer tube with an exteriorly threaded end part, an inner tube running through the inside of said outer tube and having an exteriorly substantially smooth end part projecting from said end of said outer tube substantially concentric therewith, and having an outlet aperture in its projecting end part, a cap having an internally threaded end part screwed onto saidl end part of said outer tube and a central aperture through which said substantially smooth end part of said inner tube may slide when said cap is screwed onto said outer tube, and havin a series of outlet apertures for said outer tu e, around said central aperture, a hood around said outlet apertures, and supply connections, respeetively, to said outer and inner tubes.

4. In a pressure burner, an outer tube with an exteriorly threaded end part, an inner tube running through the inside of said outer tube and having an exteriorly substantially smooth end part projecting from said end of said outer tube substantially concentric therewith, and having an outlet aperture in its projecting end part. a hood having an internally threaded end part screwed onto said end part of said outer tube with said threaded end part projecting into said hood, a cap having an internally threaded end part screwed onto said projecting end part of said outer tube and a central aperture through which said substantially smooth end part of said inner tube may slide when said cap is screwed onto said outer tube, and havin a series of outlet apertures for said outer tue, around said central aperture, said hood projecting past and around said outlet apertures, and supply connections respectively, to said outer and inner tubes.

WILLIAM F. SEILKOP. 

